Tbqc Not Recommended For Analog Modules; Analog Output Module Wiring; General; Using A Generic Terminal Block Or Strip - GE 90-30 PLC Series Installation And Hardware Manual

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TBQC not Recommended for Analog Modules

The Terminal Block Quick Connect (TBQC) Assembly is not recommended for use with analog
modules due to cable shielding requirements.

Analog Output Module Wiring

General

Each output should be connected using a good quality shielded wire with the cable shield grounded
at the module end. See GFK-0898, Series 90-30 PLC I/O Module Specifications, for more
information.

Using a Generic Terminal Block or Strip

Direct Method

TBQC not Recommended for Analog Modules
The Terminal Block Quick Connect (TBQC) Assembly is not recommended for use with analog
modules due to cable shielding requirements.
2-22 Series 90-30 PLC Installation and Hardware Manual – August 2002
Ground the shield at the field device end, exposing a minimum amount of conductor to the
noisy environment. Do not connect the shield at the module end (cut shield off at module end
of cable and insulate with shrink tubing).
Mount a terminal strip inside the control enclosure and run a shielded cable from the terminal
strip to each output circuit on the module's terminal board terminals.
Ground each cable's shield at the module end only. Do not connect the shields at the terminal
strip end (cut shields off at terminal strip end of cables and insulate with shrink tubing).
Wire the field device to the terminal strip with shielded cables, grounding the shields at the
terminal strip end only (cut shields off at field device end of cables and insulate with shrink
tubing). Also, keep the length of exposed (outside of shield) leads at the terminal strip and
device ends as short as possible.
Run a shielded cable from each field device (transducer, potentiometer, etc.) directly to the
module.
Connect the conductors to the applicable screws on the module's terminal board.
Ground the shield at the module end only, exposing a minimum amount of conductor to the
noisy environment. Do not connect the shield at the device end (cut shield off at device end of
cable and insulate with shrink tubing).
GFK-0356Q